Users signing into Bloomberg Anywhere may be prompted to install Citrix while Citrix is already installed. The default program for ICA files needs to be set to open using Citrix, but Windows can make it difficult to update the settings. So it may need to be done by opening the properties of an ICA file and changing the "Open With" setting and selecting "C:\Program Files (x86)\Citrix\ICA Client\wfcrun32.exe"

https://support.citrix.com/article/CTX804493/users-prompted-to-download-run-open-ica-file-instead-of-launching-connection